Electrochemical Behavior of Quinoxalin-2-one Derivatives at Mercury Electrodes and Its Analytical Use

Table 5

Regression parameters of calibration curves y = ax + b (significance level α= 0.05, number of calibration points 𝑛=10).

Analyte	Method (E P [V])	c [μM]	Electrolyte	𝑎±𝑠𝑎 [nA/μM]	𝑏±𝑠𝑏 [nA] [nA]	r	LOD [μM]
I	DPV (−1.075)	0.3–10.0	0.001 MNaOH	2.74 ± 0.03	0.41 ± 0.21	0.9994	0.23
I	DPV (−0.457)	0.4–2.0	0.1 M HCl	12.39±0.23	−0.01±0.30	0.9988	0.07
II	DPV (−1.010)	0.3–10.0	0.001 M NaOH	2.73 ± 0.03	0.25 ± 0.19	0.9995	0.21
III	DPV (−1.100)	0.1–1.0	B.-R.-buffer pH 7.0	26.85 ± 0.21	−0.17 ± 0.13	0.9998	0.01
III	DPP (−1.080)	0.1–1.0	B.-R.-buffer pH 7.0	23.69 ± 0.13	−0.18 ± 0.08	0.9999	0.01

E_P versus SCE, r—correlation coefficient, LOD = 3𝑠_𝑏/a.